Oliver tafiy of white-stone



Ww w iQ/rf@ MPETEWS. PHOTO-LITHOGRAPHER. WASHINGTUN. D C.

To all whom, tt may concern part-s in both figures; p

anatema @anni @titille `oli-IvanA Targon WHITE-STONE, NEW YORK.

LcttersiPatent N 104,790, dated Tune 28, 1870; anteflatcd June 16, 18770.

IMPROVEMENT IN rnooacr.:ui/1P.

The 'Sichedule referred. to in` thse Letters Patent and making part of the same,

Beit known that 1,'. OLIVER' TAFE, of Whitestone,

- in the county of `Queens and State of New York, have invented a new and ImprovedA Eloor0lamp; and I do hereby declare that Vthefollowingis a full, clear, and exact description of the same, reference being had to Vthe accompanying drawing "which formspart of this specification. Y

. The object of this iuventiouis the more convenient clamping `together of the` planks of floors while being llaidpreparatory tothe nailing down of the same; and The invention Vconsists in a door clamp ofv novel character, composed of a dog having a biting and a slidingtooth or studfor engaging with opposite sidesA ofthe joist, and `lla-vim; pivoted thereto au adjustable beariug-platc and wedge, whereby, when the dog is adjusted to the joist and the `wedge forced l.between the bearing-plate andthc edge of the plank, the back ward force of the. lwed ge exerted against the said bearing-plate, and therebyfagainstthe dog, causes,by the `penetration of the :biting tooth andthe slipping of the `sliding tooth or studithe `tighter griping'of 'the dog `upon the joistand the greater capacity of the same i for resisting the action of the wedge.

Referring to the accompanying drawing Figure 1` representsaplan view of` a Hoor-clamp, constructed according to my invention, applied to a jost-readyfor operation, and having the corners of the "dog broken away for illustrating the form of. its teeth or studs and their action upon the joist; and

Figure` 2 represents avertical end view ofthe same. Similar letters of reference indicate 'corresponding A is adog of triangular forni, having abiting tooth, a, and a sliding tootlne. Saidpteeth a, aarearranged `upon the two outer corners of the dog, andare made to project downward, so aslto" engage with the joist upon opposite sides, and are of the ,respective forms,

as shown, or of `such other forms as may render them best suited for Vthe performance of their respective functions. p

B is a bearing-plate o r \v edgecarrier,of a form-substantially as that shown in the drawing. It is secured by one edge at or near its middle to the inner corner ofthe dog, by means of a pivot, f.4 lIt also has formed in its outer or` opposite edge a dovetailed groove into which is fitted to slide a correspondingly formed tongue, c, of a wedge, C, so that the free sliding back or forth of the wedge-may be allowed without much liability of being lost therefrom.

The-wedge 0,;being of the ordinary wedgeshape, has a groove 'in its outer' edge for reception of the tongue of the plank. It has also aprojectiomb, near its butt cud, and against which the blows of the hammer, 'or other driving implement, are applied for forcing back or loosening the said wedge.

d Care interfering lugs provided respectively upon the bearing-plate or wedge-carrier and wedge for preventing inconvenience and loss of time by the accidental forcing of the llatter entirely out of :the former while being loosened or driven back.

rlhis apparatus is constructed` preferably of malleablc iron, or other metal combinin g efdciency with cheapness. i

That I claim as my invention, and desire to have secured by LettersPatent, is-

A floor-clamp, consisting of the dog A, and bearingplate, B, pivoted together, in combination with the wedge C, substantially asphereiu shown and described.

OLIYER TAFF.

i Witnesses: A.

FRANCIS J. Brennern- HENRY PALMER. 

